I am freshman in High School, I am taking an AP(college credit) test on tuesday. Im also running for president of my class and Im stressing. What do I do? How do I cope with my stress?

Within the past week I have become what seems like FLOODED with awful feelings. I’m nervous and I have butterflies in my stomach all the time. I’ve been in a good relationship for the past 9 months and things are great, however within the past week I have feelings of doubt and nervousness about it. I also worry about other aspects of my life I need to take care of, getting back into college, moving out, my job. and things of that sort. I have NEVER felt this way before. It just won’t go away. I’ve talked about everything I feel with my boyfriend so nothing stays bottled up. And for the day I’m okay because of his reassurance but it comes back the next day. My head feels heavy with thought and I’m constantly thinking about it. Is all of this normal for people? I know it is not for myself. Perhaps it is anxiety or mild depression? I don’t want to self diagnosis here. Should I see a doctor? Or give it a few excruciating days to see if it passes?
If I need to see a doctor how do you go about doing that, by saying: Hey doc, I think I may be depressed?? Seems very awkward and screams "I NEED ATTENTION!" : (
Is it normal for anxiety to come and go like it’s been doing? For example, earlier it was bad and then it was ok, I’m sure it will make its way back to me at some point today though.